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Finding the Fourth Proportional to 642,001.22, 885,960.88 and 355,520.96

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Solution

The fourth proportional to 642,001.22, 885,960.88 and 355,520.96 is: 490,618.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,001.22 : 885,960.88 = 355,520.96 : x
  2. Step 2: Convert to fraction form
    642,001.22/885,960.88 = 355,520.96/x
  3. Step 3: Cross multiply
    642,001.22x = 885,960.88 × 355,520.96
  4. Step 4: Simplify right side
    642,001.22x = 314,977,657,261.44
  5. Step 5: Solve for x
    x = 314,977,657,261.44/642,001.22
  6. Step 6: Final answer
    x = 490,618.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.